From b7e6753512c1d923ed8061c4de37f1f0ec849bd0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gabriel=20Rold=C3=A1n?= <luisgabrielroldan@gmail.com>
Date: Fri, 1 Mar 2024 18:52:27 -0300
Subject: [PATCH] Add underscore support for MIME types (#1211)

---
 lib/plug/conn/utils.ex | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/plug/conn/utils.ex b/lib/plug/conn/utils.ex
index 5bb7e20a..e2652477 100644
--- a/lib/plug/conn/utils.ex
+++ b/lib/plug/conn/utils.ex
@@ -8,7 +8,7 @@ defmodule Plug.Conn.Utils do
   @upper ?A..?Z
   @lower ?a..?z
   @alpha ?0..?9
-  @other [?., ?-, ?+]
+  @other [?., ?-, ?+, ?_]
   @space [?\s, ?\t]
   @specials ~c|()<>@,;:\\"/[]?={}|
 
@@ -32,6 +32,9 @@ defmodule Plug.Conn.Utils do
       iex> media_type "APPLICATION/vnd.ms-data+XML"
       {:ok, "application", "vnd.ms-data+xml", %{}}
 
+      iex> media_type "application/media_control+xml"
+      {:ok, "application", "media_control+xml", %{}}
+
       iex> media_type "text/*; q=1.0"
       {:ok, "text", "*", %{"q" => "1.0"}}